[unix-history] / .ref-Research-V6 / usr / sys / filsys.h

/*
 * Definition of the unix super block.
 * The root super block is allocated and
 * read in iinit/alloc.c. Subsequently
 * a super block is allocated and read
 * with each mount (smount/sys3.c) and
 * released with unmount (sumount/sys3.c).
 * A disk block is ripped off for storage.
 * See alloc.c for general alloc/free
 * routines for free list and I list.
 */
struct	filsys
{
	int	s_isize;	/* size in blocks of I list */
	int	s_fsize;	/* size in blocks of entire volume */
	int	s_nfree;	/* number of in core free blocks (0-100) */
	int	s_free[100];	/* in core free blocks */
	int	s_ninode;	/* number of in core I nodes (0-100) */
	int	s_inode[100];	/* in core free I nodes */
	char	s_flock;	/* lock during free list manipulation */
	char	s_ilock;	/* lock during I list manipulation */
	char	s_fmod;		/* super block modified flag */
	char	s_ronly;	/* mounted read-only flag */
	int	s_time[2];	/* current date of last update */
	int	pad[50];
};
Commit	Line	Data
0edd06b4 KT	1	/*
	2	* Definition of the unix super block.
	3	* The root super block is allocated and
	4	* read in iinit/alloc.c. Subsequently
	5	* a super block is allocated and read
	6	* with each mount (smount/sys3.c) and
	7	* released with unmount (sumount/sys3.c).
	8	* A disk block is ripped off for storage.
	9	* See alloc.c for general alloc/free
	10	* routines for free list and I list.
	11	*/
	12	struct filsys
	13	{
	14	int s_isize; /* size in blocks of I list */
	15	int s_fsize; /* size in blocks of entire volume */
	16	int s_nfree; /* number of in core free blocks (0-100) */
	17	int s_free[100]; /* in core free blocks */
	18	int s_ninode; /* number of in core I nodes (0-100) */
	19	int s_inode[100]; /* in core free I nodes */
	20	char s_flock; /* lock during free list manipulation */
	21	char s_ilock; /* lock during I list manipulation */
	22	char s_fmod; /* super block modified flag */
	23	char s_ronly; /* mounted read-only flag */
	24	int s_time[2]; /* current date of last update */
	25	int pad[50];
	26	};